Title :
Measuring the fine structure constant using helium fine structure
Author :
Shiner, David L. ; Dixson, Ronald
Author_Institution :
Dept. of Phys., Yale Univ., New Haven, CT, USA
fDate :
4/1/1995 12:00:00 AM
Abstract :
The fine structure of the 23S-23P transition in helium has been precisely measured using laser excitation of an atomic beam. The results give α-1=137.035 853 (3) (7) (99). The three values of standard deviation are from the uncertainty in the measured atomic frequency interval, the total experimental error (including the frequency calibration), and helium theory (1978 value), respectively
Keywords :
atomic beams; constants; excited states; fine structure; frequency measurement; helium; measurement errors; 23S-23P transition; He; He fine structure; atomic beam; atomic frequency interval; experimental error; frequency calibration; laser excitation; measurement standards; standard deviation; Atom lasers; Atomic beams; Atomic measurements; Frequency measurement; Helium; Laser excitation; Laser theory; Laser transitions; Measurement standards; Measurement uncertainty;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
